Pulverizer.



P; R. GORNWALL.

PULVERIZER.

APPLIUATION FILED Now/215. 1911.

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Patented Sept. 24, 1912.

/N VEN TUR shown in the drawinv i b I 'narran shares OF MISSOURI.

To aZZ 'Lo/wm 'it may concern:

Be it known that I, FREDERICK R. (Jouw WALL, a citizen of the United States, residing at St. Louis, `Missouri, have invented a certain' new and useful Improvement in Pulrverizers, of which the following isa full,

Clear, and exact description, such as will enmaterlal ouf-side the casing of the machine andprevent it. commingling with the ref duced material in' machine.

vIn practice, Crushers of the hammer type are frequently employed to reduce run-omi'ne coal for coling purposes, the machine beingr em ployeddat the mine. The coal is brought from the mine in cars and dumped into a bin where it is con-ducted b v a chute directly to the Crusher. This chute i-s usually provided "ith a gate or valve for the purpose of cutting off the supply of coal from the machine when' desired and for obvious reasons. Frequently the coalcoming from the mine is wet and is introduced into the machine in large lumps. This wet coal has a tendency tb choke up the feed chute and frequentlv il. gorge will be formed in the chute, which, wl machine will prothe pit or bin under the Specification of Letters Patent. Application filed November 15, 1911.

PATENT onirica PULVERIZER.

Patented Sept. 24, 1912. Serial No. 660,528.

5 it to fall into the bin under the machine as desired. It sometimes happens also that foreign, uncrushable material, such as picl Eheads or the like, are accidentally fed into the machine, in which fdrop the grinding` cage to permit such uucrushahle material beinfF thrown out without stopping the operation of the machine. ,lVhei-efthe machine is Stopped bv an vcr- Iloadoit/material, the grinding chamber is full and the hammers are brought to a standf still with the result that the driving belt will be broken or thrown ofi, the gear teeth' stripmav be lowered in the f ped it the machine gear driven, or fuse blown out, it the machine is motor driven.

Tn the drawing accompanying my appli- 5 cation, the figure represents a longitudinally,Y sectional view through a crusherin which l findicates the side frame, preterablv in the orm of a casing; 2, the front wall: 3. the

shaft onwhich arel mounted hammer sup- 1 porting;v disks 6 'cari-'yingf pivotally revolviuc' hammers 7.

v8 is the grinding' surlace in the form o'l a :cage on which vthe materialis reduced and when of such fineness as to pass through the openings in the ,f lu'indineY cage, will be delivered into the bin under the machinei This cage 8 is pivotallv mounted upon a rod 9 and is continued upwardly and torwardly to' form a breaker plate l0 on which the material' is primaril)7 reduced before be ing acted upon between the cago bars and hau'uncrs. rlhis breaker plate l0 has au extended portion and also forms the bottom Wall of thc t'ccd hopper and oi" course may be renewable, if desired,

` preferablyr seated against a rabbct The upper edge of the breaker plate is iu thc upper edge of the front wall, as shown. The free edge of the. cage is connected by a chain,l or other flexible'device 11 which` cooperates with a winding' shaft 12 on the end of which is a ratchet-wheel 13, coperatinglr with'a pawl 14 to prevent retrograde movementof the winding; shaft b v which the cage may be adjusted by means of the hand wheel event, it is desired toy rear wallj 4, the cage 'or cover, and 5 is a.

tension will shut off the supply of 15, to take up wear on the ends of the hammers and to restore the cage after the same is lowered to relieve the machine of a choke or uncrnshable, foreign material before reiterrcd to.'

The operator can, at any ,time desired, litt the pawl out. of engagement with the ratchetI and rel lase the grinding cage to permit the same to swingr to a lower position as shown by dotted lines. When in this lowered position, the breaker plate, swinging with the cage, moves against the front edge of the cover, as shown by dotted lines, and preterably under a shoulder in the tecd chute so that the material being fed to the machine through the feed chute 16 will not enter the grinding chamber. i

17 indicates a detleeting plate, preferably pivoted at its lower edge to the bottom of the front 'all 2, and when said plate is in the position shown in full lines, it may rest against lugs 1 on the side frame castings.

The front wall 2 is provided with an opening f2 and when the detlectin'g plate is in thc position shown by full lines and the cage is lowered, the breaker plate acts as a valve or gate, t0 prevent the material from entering the grinding chamber' and compels said material to take a path alongside of the grinding chamber so that when it strikes the detlecting plate, it will be diverted through the opening 2 outside of the inachine. f

If desired, the deflecting plate ma)T be swung to a. vertical position to close the opening 2'* and locked in such vertical position by means of a locking devicelS operated by `land onthe oiitside of thc lnachine.

lVhen the detlecting plate is in such vertical position and the cage is lowered, the material will not be detlected outside of the machine, or permitted to drop int-o the bin or receptacle under the machine.

I do not claim in this application, thc pivotcd grinding cage or winding mechanism employed for raisingand lowering the same, as the same is disclosed in the patent to M. IP WVilliams, No. 8-t3,729dated February 12, 1907, except so far as they enter into a novel combination of elements set forth in the followingclaims.

What l claim is: l

1. In a machine of thc character described, the combination of hammers, a grinding surface, a breaker plate upon which the material is primarily crushed, said breaker plate having an extension, and means forV moving said breaker plate wherebyv said exmaterial to' the grinding surface.

2. In a machine of the character described, the combination of hammers, a pivoted grinding surface, and a pivoted breaker plate, said grinding surtace and breaker platev being connected so as to move together, whereby, when the grinding surface is lowered, the breaker ,plate will shut oit the supply of material to the machine. Y

3. In a machine of the character described, the comljiination ot' hammers,l a movable `grinding surface. means for permitting said lgrinding' surface to be lowered and for raising said grindingsurface agin to operative position, and a pivoted' b'ri'ilrer platel connected to said grinding' surface, whereby when the grinding surface is lowered, the breaker plate will shut ot'fthe supply of material from the machine. l

l. In a machine ot the character described, the combination otl hammers. a grinding surface, a feed hopper. one wall of'whish is movable to shut otl' the supply of material to the grinding surface, and mains for directing' the material outside of the machine when said wall is moved to its shut-olf position.

In a machine of the character described, the ccmbimition ot hammers. a grinding surface. a i'eed hopper for directing the material to the grinding surt'aee, means for moving one v; l of .-aid'hopper to shut oil the supply of material to the grinding surit'acc, and a detlccting wall for diverting the material so shut otl1 from the `winding surface to a point outside thc machine.

Ina machine of the character described, the combination of hammers, a grinding surtace, a pivoted breaker' plate, and a pivoted dctlecting plate for detlecting material flowing` in front of said breaker plate when the latter is raised.

7. ln a machine of the character described, the combination of a casing, the front wall of which is provided with an-opening, hainmcrs, a grindingr surface, a pivoted br xaker ptatc means for moving the breaker plate to shut otl the supply of material to the grinding surface, and a detlecting plate for detlecting material through said opening or permitting said material to tall within the machine when the breaker-plate is raised.

8. ln a mill, the combination of a grinding cylinder having a grinding cage, beaters adapted to coperate with said cage, a. feed hopper eoxmnunicating with said cylinder, and means for adjusting said cage whereby 'a portion thereof is moved to prevent ingress of material into said cylinder from said hopper.

t). In a mill, the combination of a casing' forming' a chamberja grinding surface and beaters within said chamber. a Ieed hopper communicating with said chamber and means 'tor moving a portion otsad grinding' Surface to cnt otl' the comnnluitaition between said chamber and said hopper.

l0. In a mill, the combination of a casing forming a chamber, beaters mounted in said chamber, a grinding cage coperatng with In testimony whereof I hereunto aix my said beaters, av feed hoppen, and means for signature in the presence of two wibnesses, adjusting a portion of sald grinding cage this 10th day of November, 1911.

whereby material contained therein is moved FREDERICK R. CORNWALL. from the reach of said beaters and @mm1- \Vtnesses: .nic-ation cut off between said chambex` and M. P. SMITH,

said feed hopper. LILY Ros'r. 

